Refrigerating apparatus



4s. HQ TobD REERIGERATINGAPPARATUS Filed .June 28. 19214 INI/mpx." S ummm FLT odd Condenser ,3

ATTORNEY. l`

Patented Aug-.281, 119:23. n i UNITE-D STATES PATENT OFFICE.;

produce a worse contamination than was. createdto overcome.-

I have discovered that the common s onge (Europaga ocz'nalz's-pofeme), if o suf- 00 To all 'whom tmy'comem:

Be it known that'I, SAMUEL H. Tono a citizen-of the United States, residin at etroit, in the county of Wayne and tate of employed;

Michigan, have invented a certain .new and useful Improvement in Refrigerating A paratus,'of which the following is a full, c ear, and exact description, reference being had to the accompan ing drawings.

This invention relates to refrigerating apparatus and has for its objects the provlsion of a new, improved, and simplified form of trap or filter for removing designed for refrigeratlng apparatus of the, domestic typlwherein sulphur-dioxide is e objects ofthe invention are the provision of a filter which shall be inexpensive in construction, unaffected by the re rigerant liquid either when pure or contaminated by-the customary impurities, certain and reliablein o clogginfggthe provislon of a filter so constructe mounted, and arranged as to be susceptible of easy cleanin notwithstanding the offensive character o the refrigerant; the. provision of a filter which shall remove all. solid impurities from the refrigerant; while further objects and advantages of the invention will become apparent as the de-. scription proceeds.

In a refrigerating a vparatus of the customary compressor-con enser-expande'r type the refrigerant vapor 'is condensed by cooling after the same has been compressed by a. mechanical'compressor operating against a .How lrestricting device which so retards the movement of the refrigerant so as-to en able the compressor toproduce the necessary pressure. This element is named herein the retarding device and may either consist of an automatic .reducing valve, ahand operated valve, a constant slzed apertire, or a porousym'ember, all of which are of -known use in apparatus of this character.

' -These devices are alike in that an accumulation of foreign matter' can completely de range the operation of the apParatua-either by clogging the passage therethrou h so as to sto the flow or by preventing t e seating o the lvalve so as to rendenit impossible for the necessary condensing pressure to be .clogged or becoming and itself securedl For this reason filtering 'devices are preferably employed to arrest all sc lxd particles but without itself becoming oreign matterv from the refrigerant liquid, and is specially ration and free from passage-way in' which it is placed, consti- 05 tutes a remarkably 'successful filtering material for this urpose. .It is absolutely not affected by su phur-dioxide, either 'in liquid or gaseous form, either pure or mixed with air. or containing up to 50 per cent of water. "10

This substance permits the passage of sulphur-dioxide at ease but'stops all gritty and metallic particles, and owing to its soft and yielding nature 1s proof against becoming clogge to its very great surface area its capacity for holding foreign. matter is very great.-

In the drawings accompanying and forming a part of this application I have illustrated certain physical formsin which my'so invention can be embodied, but without intent to limit myself to any of the features therein shown except as the same` are'al'so're-v cited in my claims.. Fig. 1 is a.4 diagram(- matic View of 'a refrigerating system illus- .35

trating one mode of applying my 1mprove ments Fig. 2 is an enlarged sectional detail viewof one of the'traps embodying my improvements; and Fig. 3 is a detail sectional. view of asecond trap embodying my 00 1m rovements. escribing the ,parts by reference characters, 1 represents, a compressor of any suitable type connected by' a pipe 2 to the c011- denser which may be Aof an' suitable type 95 and has its outlet end canne ed-by'the pipe 4 to the retarding device 5-which may be of any suitable type The outlet side of this retardingde'vice. is connectedto the expan sion coil 6 lwhich may be of any suitable 100.

type and has its outlet connected by a 7 to the inlet side ofthe compressor 1.

cured to the outlet end of Vthe condenser is a suitable shutof valve 8 to whichis attached my improved trap 9. As shown in m.

Fig. 2 this valve khas a passage-,way 10 connected to the 'condenser' and adapted to be closed by the valve 11. It'may also have a illin opening 12, though thisis not essentia, to the 'present improvement. The n.'

valve has an outlet passage 13 toA which is detahably secured the base 14 ofthe hollow like'a metallic screen. Also owing 75 capsule 17 of screen clothlwhlch its. snugly f cleaned sfu stantiially AWithout. odor.

chamber 15, to the opposite end of which is .removably attached the apertured head 15a communicating with the pipe 4. The sponge 16 is preferablyA located 1n a into the chamber 15, the end of such capsule which is presented toward the infowing stream being open except for a narrow rim 18. One or two wires 19 may well traverse the open end of the capsule to hold the sponge in place but'lwithout impeding the access of llquid thereto. This enables the replacement of capsules withease in case the sponge becomes iilled with sediment and the screen cloth also prevents the passage of grit in case a channel 4should open through the sponge.

' In like` manner a filter can be provided adjacent the expansionvalve, the body of the same being here shown as provided with a chamber 20 cast therein having atone end the inlet opening 21 adapted for the reception of the pipe 4 and having near the oppo-j site end an outlet port 22 leading to the valve. ln this case l have shown a similar capsule 17a seated near the. opening 21 and the other end of the chamber closed by the screwplug 23, which presses the sponge 16 against the separator.

lt is suicient if only'vone of these traps be, employed, although two are preferable.

rtheir proper location is between the condenser and retarding device; and there' shouldbe in any event a valve between the Acondenser and the nearest trap, and also preferably a -second similarl valve ,'25 between the .compressor and condenser.

In ratice the sponge nearest the inlet `end o the trapvwill soon become black with iine metallic particles, that near the outlet end-remaining white and clean. When it is desired to cleanse either trap the valve 8 is closed and the compressor operated until all the refrigerant in the entire system is compressed inthe" condenser, after which either of the traV s 9 or 20 can be opened and The inlet end of each trap consists of ,an empty chamberfor sediment. The valve 25 would be unnecessary in case the compressor valves were absolutely tight, but itis best to use it to e lege from this source. As soon as the traps are cleaned and reattached to the sy .am the Valves `can be opened and the s stem operatedas before. v g l li e aim both the use of onge as atlter.- substance, regardless d? the mechanical -coction or Vthe apparatus d also' such riet fsignature.

to sponge l do not'limit myself to any onel species or quality since many .varieties of the pkg/Zum porifem are suitable; The vap known on the market as sheeps woo (Spongz'a gossyp'na) is the best but the yellow Sponges are practically as good (E 'nspongz'a oyc'z'nalz's) and the material can be used either in its natural integral state when suliiciently dense or can be comminuted and packed together if a coarser variety be employed.

Having thusdescribed my invention what ll claim is: v

parat-us employing sulphur dioxide as a working fluid, of a filter consisting of common sponge (pofem) compressed in a casmg and located in the line of How liquid refrigerant.

2. In refrigerating' apparatus, the comof the bination with a compressor, a coridenser.,a

retarding device, and an expansion coil connected together lin a closed system in the order named, and having a4 charge of sulhur dioxide therein, of a ltering Vchamer located between said condenser and said retardmg device, and sponge (porfera) contained in said chamber as aV ltering material. i

' 3. ln refrigerating apparatus, the "com-'- 1. The combination with refrigerating apretarding device, andan expansion coil con- 'nected together in a closed system in the order named, and having a charge of-,sulphur dloxide therein, of ,a filtering chamber located between said condenser and said retar-ding device, a perforated separator in said chamber, a. removable closure for the outlet end cfr-said chamber, and a sponge (pori/fem) vheld in the chamber by said separator. A A 4:. In refrigerating apparatus, the com'- bination with a compressor, a condenser, a hollow member, a retail-ding device, and an expansion coil connected together in a closed system in the order named and havinga charge ofsulphur; dioxide therein, of a perico llt@

forated separator in said hollow member, a

shut on' valve .between said condenser and said inlet chamber, a removable closure. for

'said Ahollow member, and sponge (Spangen .gossypz'mr) in said hollow member.

lln testimony whereof, ll'lnereo at: my.

s nrcan 

